Half to james m



3 Sheets-Sheet 1.

(No Model.)

A. T. BREWER.

GOMBINATION FEED WATER HEATER ANDEOILEE.

Patentedv July 5, 1892.

HHIIHIW (No Model.) 3 Sheets-Sheet 2.

A.' T. BREWER. COMBINATION FEED WATER HEATER AND BOILER. No. 478,395.

Patented July 5, 189,2.

Jig# 2 @i5/laws A (No Model.) 3' sheetssneer 3. A. T. BREWER. COMBINATION 'FEED WATER HEATER AND BOILER. NO. 478,395.

Patented July, `1892.

me Noms rei-zus co., matarme., wuummnn, n. n.

UNITED STATES yPATENT OFFICE.

ANDREW T. BREWER, OE MINNEAPOLIS, MINNESOTA, AssIeNOE OE ONE- HALE 'ro JAMES M. BOYD, JR., lOE SAME PLACE.

COMBINATION lFEED-WATER HEATER AND BOILER.

SPECIFICATION forming part of Letters Patent No. 478,395, dated July 5, 1892.

Application tiled March 19, 1892.v

To all whom it may concern:

Be it known that I, ANDREW T. BREWER, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, havevinvented certain new and useful Improvements in a Combination Feed- Water Heater and Boiler; and I do hereby declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to steam plants, and has for its object to provide an apparatus which can be interchangeably used either as a feed-water heater for the main or primary boiler of the plant or as a temporary boiler to run the pump-engine for refilling the main boiler, when for any reason it may have become empty-as, for example, when cleaning out the same.

As is well-known, steam plants are used inV many localities where water-pressure from -a main or head of water is unavailable. This is common in steam plants used both forrunning a steam-engine orfor heating purposes in connection with a series of radiators. In all such cases it is of course necessary to occasionally empty the boiler for cleaning the same. In thatevent it has hitherto, so far as I am aware, been necessary to refill the Inain boiler by hand, which is of course a laborious and tedious operation. It is common, as is well known, to heat the feed-Water for the main boiler by means of the exhaust-steam from the niain engine or radiators.

The object of my invention is to so construct this feed-water heater and its connections that it may be converted at will into a telnporary boiler for supplying steam for running the pump-engine long enough to refill the main boiler.

To this end I employ a receptacle which is divided OE into suitable water and heat medium compartments or divisions for the circulation of the Water and the heat medium, and I provide valved inllow and outflow circulatingpipes to and fromthe water-division, the latter of which terminates in the boiler, and the former of which, in addition to its connection with the pump, has a valved branch extend- 'ing to the boiler, a fire-pot constituting one Serial No. 425,593. (No model.)

element or compartment of the heat-medium division and provided withdetachable means for closing its fuel and draft openings steamtight, and an eXhaust-steam-supply pipe from the main engine or radiators delivering to the said heat-medium division. Preferably the receptacle is composed of concentric closed drums spaced apart "from each other,the inner member of which is used as the waterdivision and the outer member of which or the space between the two shells, together with the fire-pot located within and near the bottom of the inner drum, a series of heatflues from the said fire-pot extending through the water-division, and a down-current circulating-pipe for the exhaust-steam, receiving froinnear the top of the outside drum and delivering into the fire-pot, constitute the heatmedium division. A valved live-steam pipe extends from `the top of the water-division to the pump-engine, the connection with which may be common with that of the valved livesteam pipe leading to the pump from the main engine. A fuel-doorand a draft-register may be provided for use onv the fire-pot when the plugs are removed. Normally the device will act as a feed-water heater for the main boiler. When for any reason the main boiler is empty, it is only necessary to turn the valves and apply fuel in the fire-pot of the receptacle before named, and steam may be generated therefrom to drive the pump-envine.

b The apparatus is illustrated in the accompanying drawings.

Therein, like letters referring to like parts throughout, Figure 1 is a View, partly in front elevation and partly in vertical section, with some of the parts broken away, of my preferred apparatus. Fig. 2 is a View in elevation representing in diagram a part of the main boiler and engine of the plant. Fig. 3 is a vertical section through the fire-pot portion of the receptacle, and Figa is a horizontal section on the line X X of Fig. 1.

A is the main or primary boiler, B the main engine, B the live-steam-supply pipe to the same from the boiler A, C the pump, and C the pump-engine, the said parts constituting the main elements of an ordinary steam plant, wherein the live steam is used as motive power.

D and E are respectively the inner and outer closed drums,constitutingthe main compartments of the interchangeable feed-Water heater and temporary boiler, the former constituting the water-division and the latter one compartment of the heat-medium division.

D', D2, and D3 are the feed-water connections from the pump, of which the branch D2 terminates in the drum D and the branch D3 in the main boiler. The branch D2is provided with a valve (l and the branch D3 with a valve Cl.

D4 is the outflow-pipe for the feed-Water from the compartment D to the main boiler A, and is provided with a valve d2.

F F F2 are the live-steam-supply pipes to the `pump-engine C', of which the branch F leads from the main boiler A and the branch F2 froln the compartment D. The branch F is provided with valve f, the main pipe F with the throttle-valve j, and the branch F2 with the valve f2.

E' is the fire-pot, located within and near the bottom of the inner drum D and separated i therefrom by water-tight walls.

E2 is a removable plug for closing the fuelinlet, and Ea corresponding plug for closing the draft-register opening of the same.

E4 is the grate, and E5 the ash space or boxl below the same.

E6 are hinge-lugs for the application of` doors over the fuel and draft inlets of the tire-pot.

E7 is the exhaust-steam pipe from the en-; gine B, tapping the outer drum E and deliv-` ering thereto near its bottom.

E8 is a down-current exhaust-steam pipe receiving from near the top of the said drum ati a point diametrically opposite the inlet from the pipe E7 and delivering into the ash-box of the fire-pot.

E and E10 are respectively a hood and pipe i formed continuous with the outer shell of the outer drum and constituting the outlet for the heat medium, delivering either into the open air or into a stack. (Not shown.)

E are heat-fines in vertical arrangementl feed and draft openings are closed by thel plugs, as shown in Fig. 1. The live-steam conl nections to the pump are set for admission from the main boiler, the section F2 beingl closed by the valve f2, and the feed-water connections are set for a continuous tlow from the pump through D2, innerdrutn D, and the1 outlow-pipe D4, the cold-water section D31 from the pump to the main boilerbeing closed by the valve d. the con nections the apparatus will simply With this arrangement of work as an exhaust-steam feed-water heater for the main boiler.

Vhen it is desired to use the apparatus as a temporary boiler, the plugs E2 and E3 are removed from the fire-pot and doors (not shown) substituted therefor. The section D2 of the feed-pipe from the pump is closed "and the section D3 opened. The section F of the live-steam pipe from the main boiler is closed and the section F2 is opened. The outflow feed-water pipe Dl is also closed by the valve d2. Fuel is then applied in the tire-potE', and the live steam will be carried off by the section F2 to the su pply-pipe F and be delivered to the pump-engine, driving the pump and delivering the Water therefrom to the main boiler through the section D3 until the boiler is filled. The connections may then again be changed, the plugs restored to the {ire-pot, and on starting the main engine B the apparatus will then again resume its normal action as a feed-water heater.

It will of course be understood that the operation vwould be the same if a set of steam- `radiators were substituted instead of the `main engine B. The convenience and value of such an apparatus as this for refilling the empty boiler of a single-boiler steam plant in localities Where water-pressure from a main or a head is unavailable will be fully understood and appreciated by all persons having apractical knowledge of such Steam plants. Boilers must be frequently emptied for cleaning and repairs. It is economical to use an exhauststeam feed water heater. My invention makes such a heater available at will for refilling the boiler.

It should be noted that the relative ar-` rangement of the water and the exhaust-steam compartments aiford a very ecient form of feed-water heater. The exhaust-steam conduits inclose and subdivide the water-coinpartment, thereby bringing a very large amount of radiating-surface into contact with relatively small columns of water.

What I claim, and desire to secure by Letters Patent of the United States,is as follows:

l. ln a steam plant, an apparatus interchangeably usable as a feed-water heater or as a temporary boiler, comprising a receptacle divided into water and heat-m edium compartments or divisions, valved inflow and outflow circulating-pipes to and from the waterdivision for the feed-water, a tire-pot constituting one element or compartment of the heat-medium division, suitable inlet and outlet openings for the heat medium, and an outflow live-steam pipe from the water-division to the feed-water pump, substantially as and for the purpose set forth.

2. In a steam plant, an apparatus interchangeably usable as an exhaust-steamfeedwater heater or as a temporary boiler, comprising a receptacle divided into Water and heat-medium divisions, valved inflow and outtiow circulating-pipes for the feed-water, a fire-pot forming one compartment of the heat- ICO IIC

medium division, an inlet-pipe for exhauststeam to said heat-medium division, an outlet for the heat medium, an outfiow live-steam pipe from the Water-division to the feed-Water pump, and means for closing the re-pot Hue and draft-openings steam-tight when employing the apparatus as a feed-Water heater, substantially as described.

3. In a steam plant, the combination, with the primary or main boiler` for supplying live steam to an engine or system of radiators, ot"

a steam-pump, a receptacle having Water and heat-medium divisions, direct and indirect Valved feed-Water connections from the pump to the boiler, one branch of which is-through the water-division of said receptacle, valved live-steam connections to the pump-engine, one, branch of which is from the top of the water-division of the said receptacle, an exhaust-steam pipe delivering to the heat-medium division of said receptacle, and a firepot constituting one compartment of the said heat-medium division and provided with removable plugs for closing its fuel and draftregister openings steam-tight, substantially as and for the purpose set forth.

4. The combination, with the receptacle composed of closed concentric drums, of a box or dome Within .the-inner drum near the bottom of the same, iues from the said box passing through the inner drum, feed-Water-circulating connections to and from the inner drum, an inlet exhaust-steam pipe delivering into the outer drum near its bottom, a circulating exhaust-steam pipe receiving from the top of the outer drum at a point opposite the inlet-pipe and delivering into the said box or dome-at thel bottom of the inner drum, and an outlet-hood and discharge-pipe for the eX- haust-steam or other heat medium extended from the top of the drum,substantially as described.

In testimony whereof I aftix my signature in presence of two Witnesses.

ANDREW T. BREWER.

Witnesses:

JAS. M. BOYD, Jr.,

JAS. F. WILLIAMSON. 

